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DIY PORTABLE POWER BANK

About: I am an electrical student living at chennai i love electronics very much.
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Make simple portable power bank using 9-volt battery and basic electronics components. use it to charge your mobile phone at any emergency situation. simple and compact you can also add this to your survival kit bag.

Step 3: CIRCUIT DIAGRAM

The battery provides 9-volt. But the charging voltage for mobile phone is 5-volt. Voltage regulator 7805 is used. it gives 5-volt output when it get input above 6-volt.

Step 4: HET SINK TUBE

Use heat sink tube to close bare opening of the circuit. Also to prevent from short-circuit occurence and compact in hand.

Step 5: CHECKING BATTERY

The 9-volt battery is not a rechargeable battery. It is to be ensured that the battery can able to give required voltage to charge phone. The LED in the circuit used to check the battery condition. if the battery level decreased the LED doesn't glow this will help us to find the correct battery.

Step 6: CHARGING MOBILE

The 9-volt battery have a lot of limitation. it doesn't give full charge. because the battery rating is not up to the level.But used to charge mobile to some level which is sufficient for emergency situation.